Beijing Olympic National Stadium is located in the central area of the park south of 29th in 2008 Olympic Games main stadium. The total area of 21 hectares, construction area of 258,000 square meters. Venue seating almost 91,000 spectators, including almost 11,000 short-lived seats. Held at the Olympic Games and Paralympic Games opening and closing ceremonies, athletics and soccer terminals. Beijing Olympic Games will be vast public participation in sports activities and important professional sports and entertainment to enjoy the area, and become a landmark building and the Olympic sports legacy.
Limit of 100 years, bombard resistance rating for the class 8 degree earthquake intensity, a level of underground water. Space harness of the main architecture works were oval, north to south and 333 meters, 294 meters from east to west, tall 69 meters. The main steel structure of the immense space saddle manner one overall braided steel truss-style "Bird's Nest" structure, the total steel capacity 42,000 tons of steel, concrete stands divided into upper, middle and lower three floors underground cement structure stands a membrane 7 floor ground of the reinforced concrete frame - mow walls structure. The upper portion of steel and concrete grandstand entirely torn off and loosened, the fashion was enclosed with every additional, based on the basis slab sitting on a connected. National Stadium roof steel structure covered with a twice film structure, namely is nailed in the steel winding between the upper perspicuous ETFE membrane and fixed below the bottom chords of steel structure and the lower internal wall of translucent PTFE acoustic dome.
National Stadium by PPP (Private + Public + Partnership) model creating, by the Beijing State-owned Assets Management Co., Ltd. and China CITIC Group, a consortium to jointly set up the project corporation, is responsible for the national stadium financing, construction, action and management of . Commonwealth funded 42% of CITIC, Beijing State-owned Assets Management Co.,[link widoczny dla zalogowanych], Ltd. ashore behalf of the Government for 58% of the funding. CITIC consortium likewise has 30 years behind the game franchise. National Stadium for a citizen milestone, the 2008 Olympic Games main stadium, its structural traits is significant, the National Stadium intricate. Exist in the devise and construction of numerous of the characteristics and difficulties: as the main load-bearing roof architecture components, the largest truss column cross-section of 25m 20m, altitude 67m, unattached samples of the weight of 500 tons. The main truss height of 12m, the maximum span of two-Pin through 145.577 +112.788 m, the largest not through truss span 102.391m, the main truss truss columns and large size, heavy weight monomer.
As the project components are box section bars, so, whether it is between the main structure, or between basic and secondary structure, there is apartment for multiple rods intersect phenomenon. Combined with sub-structure complex, less regular, resulting in the primary structure of the knot structure is a complex variety of node types, industry and installation of high accuracy. Large quantity of this project, but the installation phase is very short,[link widoczny dla zalogowanych], works on December 24, 2003 start, completed by the end of 2007, for achievement by the end of March 2008. Tight schedule, with the civil construction work cross-plane field stress. Project site connecting the segments for welding lifting more than the length of long field solder, and the thick panel welding, high strength steel welding, steel welding and so the bulk, resulting in a considerable measure of work-site welding, high difficulty, high-altitude welding on the head of rank welding and more.
Hoisting the main structure of this project necessitated over the winter and spring time, winter and raining season so there is construction, construction difficult. Hoisting the main structure,[link widoczny dla zalogowanych], the civil construction is not finished, site convergence is carried out a large space, so there is the phenomenon of multi-party construction crossover operation. Additionally, on-site venue is small, the construction site layout, component transmission routes and large cranes, etc. is very impeded. Meanwhile, the complex structure of this project, the association between lifting segment, must be amassed in sequence, lifting, otherwise it will emerge slowdown phenomenon. The construction side to be well-coordinated, integrated management, engineering unions difficult. To dilute the assembly difficulty, this project ambition be secondhand in the horizontal truss columns spelling, the spelling of the main truss ambition use the smooth (except for the inner main truss stand to fight), so the assembly after turning over the work must be carried out ahead lifting.
As makeup was larger, massive weight, turning point when the suspension lug choice of settings and difficult, especially the truss column stand, turn approximately and elevating heaving lug in force when the change ought be considered along the three- compel. Meanwhile, the permanence of the process of turning over relatively complicated apt control. As the main truss truss section column and jaws are box section, there are several sub-hoisting pipe butt problem, as the carton section, to ensure the accuracy more than their similarities in the nozzle, the hardship namely huge. Lifting, you have to adjust the angle and orientation sub-components, and as massive size and weight of the component, angle correction namely very laborious, elevating heaving difficult.